94 Mercedes leather cracks and colour repair

[mjames228]

Hi Roger,

I've been working on another leather seat (black) along side the beige one, for another vehicle.
Leather was somewhat hard (for it's age)
I followed post #17 and then went to the leather rejuvenation process of applying with a horsehair brush, the hydrator3.3 to saturate the full seat allowed to dwell. Re-application was required as the leather soaked in the hydrtor3.3.
Once the leather was damp after this soaking, fatliquor5.0 was applied and re-applied until the leather showed it was not absorbing anymore.

The leather feel was definitely much softer vs. prior to the start.

I then cleaned off this slight excess film of fatliquor5.0 using the rinse>cleanse>rinse process.

For the leather cracks shown on the seat bottom, I applied the 1:2 ratio mix impregnator26/distilled water, to the cracks shown and wiped off any excess and allowed it to dry.

MY question is, do the fine line cracks in the perforated seat bottom require the application of the bond 3D? Or is this product used for more apparent leather tears and repairs?

[Roger Koh]

>>> MY question is, do the fine line cracks in the perforated seat bottom require the application of the bond 3D? Or is this product used for more apparent leather tears and repairs?

Leather Glue 3D is for more apparent leather tears and repairs, and may be too heavy for fine-line crack repairs.

As these fine-line cracks are found in the seating area, the flexibility of the repair without cracking during usage, and the ease of repairing, are some points to consider when choosing which product to use progressively.

Between Impregnator 26 and Glue 3D, Repairer R4 is recommended after Impregnator 26. Stucco 9S easily fills up cracks, but by itself may have poor flexibility that eventually shows cracking, however, when mixed with Repairer R4, it becomes easier to work, and should withstand a longer-lasting repair from constant sitting stresses.

Understanding the characteristics of these repair products with some testing should enable us to accomplish the desired result.

[mjames228]

>>> MY question is, do the fine line cracks in the perforated seat bottom require the application of the bond 3D? Or is this product used for more apparent leather tears and repairs?

Leather Glue 3D is for more apparent leather tears and repairs, and may be too heavy for fine-line crack repairs.

As these fine-line cracks are found in the seating area, the flexibility of the repair without cracking during usage, and the ease of repairing, are some points to consider when choosing which product to use progressively.

Between Impregnator 26 and Glue 3D, Repairer R4 is recommended after Impregnator 26. Stucco 9S easily fills up cracks, but by itself may have poor flexibility that eventually shows cracking, however, when mixed with Repairer R4, it becomes easier to work, and should withstand a longer-lasting repair from constant sitting stresses.

Understanding the characteristics of these repair products with some testing should enable us to accomplish the desired result.

Repairer R4 arrived today.
My comments.
Opening the squeeze bottle ever-so-slightly, I applied it, by squeezing the bottle to control the amount coming out - just a very small trail of the liquid to cover the stress cracks.
As you suggested, I used a very small spoon (a souvenir spoon) and spread the R4 along the crack lines or stress wrinkles.
I let it dry naturally. It leaves behind a bit of a sheen where it is applied.